Book/Report

FZJ-2018-04106

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Anwendung der Stoffgleichung "Ein-Parameter-Modell" auf eine hochwarmfeste Legierung

Schwarze, E. (Corresponding author)FZJ* ; Schuster, H.FZJ* ; Nickel, H.FZJ*

1993
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/19287

Report No.: Juel-2714

Abstract: In the present work a constitutive model earlier developed and used to predict experimental results of hot tensile tests and fatigue tests from creep experiments ofmetallic materials were modified to comply with the properties of a high temperature resistant material. The improved model accounts for the properties of a material developing a density and a structure of dislocation Unes which are capable of interactions with particles (carbides) from a second phase. The time and temperature dependent evolution of the carbide structure has been described by an equation which explains the formation of seeds as well as their growths (Ostwald ripening). The extended model was applied to Incoloy 800H which is known to develope a carbide structure. Therefore hot tensile and fatigue tests, creep and relaxation experiments using the heats ADU and BAK (KFA specifications) at temperature between 800 ° C and 900 ° C were performed including both solution treated specimens and specimens heat treated for 10, 100 and 1000 hours. As compared with the results from tensile tests where the carbide structures play a subordinated role, alternately, these structures have a decisive influence on the creep properties of specimens during the primary creep phase, i. e. at low stresses and hightemperatures.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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